Umbrella stand



FIG. 1 is a perspective view of the umbrella stand;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view of thereof; and,

FIG. 7 is a bottom plan view thereof.

Surface shading is included in the figures to depict surface curvature, flatness or other shapes. 

CLAIM The ornamental design for an umbrella stand, as shown and described. 